A CO2 gas-liquid phase transition-based multistage compression energy storage apparatus for converting thermal energy into mechanical energy, including: a gas storage; a liquid storage tank; an energy storage assembly, which includes compressors and energy storage heat exchangers; an energy release assembly (400), which includes energy release heat exchangers and expanders; a heat exchange assembly the energy generated by the energy storage assembly, and the energy release heat exchangers being capable of receiving the energy temporarily stored by the heat exchange assembly; and a driving assembly, which includes an energy input member and a first driving member, the energy input member absorbing external thermal energy to drive the first driving member to work, and the first driving member being used for driving the compressors to work.
The present invention belongs to the technical field of energy storage. Provided are a storage unit for a carbon dioxide gas-liquid phase-change energy storage system, a control method, and system. The storage unit for a carbon dioxide gas-liquid phase-change energy storage system is provided with an energy storage container, a condenser and an energy-storage pressure-maintaining flow path, wherein the energy storage container is used for storing gaseous carbon dioxide and liquid carbon dioxide; the condenser is connected to the energy storage container, and is used for condensing gaseous carbon dioxide into liquid carbon dioxide; the energy-storage pressure-maintaining flow path forms a closed-loop connection with the energy storage container and the condenser; and in an energy storage stage of the energy storage system and in an interval time period of energy storage and energy release, gaseous carbon dioxide in the energy storage container can flow into the condenser via the energy-storage pressure-maintaining flow path, so as to be condensed into liquid carbon dioxide, and then flow back to the energy storage container, so as to stabilize, in the energy storage stage, the pressure of the energy storage container in a design pressure range of the energy storage system. The storage unit can keep the pressure in an energy storage container stable in an energy storage stage.
The present invention belongs to the technical field of energy storage. Provided are a storage unit of a carbon dioxide gas-liquid phase change energy storage system, a control method therefor, and a system. The storage unit of a carbon dioxide gas-liquid phase change energy storage system is provided with an energy storage container, an evaporator and an energy release pressure-maintaining flow line, wherein the energy storage container is used for storing gaseous carbon dioxide and liquid carbon dioxide; the evaporator is connected to the energy storage container and is used for evaporating the liquid carbon dioxide into gaseous carbon dioxide; and the energy release pressure-maintaining flow line is in closed-loop connection with the energy storage container and the evaporator, the liquid carbon dioxide in the energy storage container can be evaporated into gaseous carbon dioxide by means of the evaporator during an energy release stage of the energy storage system, and part or all of the gaseous carbon dioxide flows back to the energy storage container, such that the pressure of the energy storage container is kept stable within a design pressure range of the energy storage system during the energy release stage. By means of the storage unit, the pressure in an energy storage working-medium container can be kept stable during an energy release stage.
An energy storage device and method based on carbon dioxide gas-liquid phase change. The energy storage device based on carbon dioxide gas-liquid phase change comprises: a gas storage (100); a liquid storage tank (200); an energy storage assembly (300), the energy storage assembly (300) being arranged between the gas storage (100) and the liquid storage tank (200), and carbon dioxide being changed from a gas state to a liquid state through the energy storage assembly (300); an energy release assembly (400), the energy release assembly (400) being arranged between the gas storage (100) and the liquid storage tank (200), and the carbon dioxide being changed from the liquid state to the gas state through the energy release assembly (400); a heat exchange assembly (500), the energy storage assembly (300) and the energy release assembly (400) being both connected to the heat exchange assembly (500), and the heat exchange assembly (500) being capable of transferring some of the energy generated in the energy storage assembly (300) to the energy release assembly (400); and a heat recovery assembly, at least one of energy released when the carbon dioxide is changed from the gas state to the liquid state, energy released when the carbon dioxide is cooled before entering the gas storage (100), and energy released when a heat exchange medium is cooled being recovered by the heat recovery assembly and used for evaporation of the carbon dioxide. The device can reduce energy waste in storage and release processes and improve the energy utilization rate.
An energy storage apparatus and method based on carbon dioxide gas-liquid phase change. The energy storage apparatus comprises a gas storage reservoir; a liquid storage tank; an energy storage assembly, provided between the gas storage reservoir and the liquid storage tank, wherein the energy storage assembly comprises a condenser and at least two compression energy storage parts, the compression energy storage parts each comprise a compressor and an energy storage heat exchanger; an energy release assembly, provided between the gas storage reservoir and the liquid storage tank, wherein the energy release assembly comprises an evaporator, an energy release cooler, and at least one expansion energy release part, the expansion energy release part comprises an expander and an energy release heat exchanger; and a heat exchange assembly, comprising a cool storage tank, a heat storage tank, and a heat recovery heat exchanger.
F01K 25/10 - Plants or engines characterised by use of special working fluids, not otherwise provided forPlants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
F01K 3/14 - Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having both steam accumulator and heater, e.g. superheating accumulator
6.
GAS STORAGE RESERVOIR, ENERGY STORAGE DEVICE, AND CONTROL METHOD AND MOUNTING METHOD FOR GAS STORAGE RESERVOIR
A gas storage reservoir, an energy storage device, and a control method and a mounting method for the gas storage reservoir. An inner foundation structure surrounds the outer side of a ground film; an outer foundation structure surrounds the outer side of the inner foundation structure; the edge of an inner film is fixed to the inner foundation structure; an inner cable net is arranged on the outer surface of the inner film; an accommodating cavity is defined between the inner film and the ground film, and the inner film comprises a metal layer; an outer film structure covers the outside of the inner film structure; the outer film structure comprises an outer film and an outer cable net; an interlayer cavity is defined between the outer film and the inner film; an air supply device is configured to inflate the interlayer cavity.
A gas storage reservoir, an energy storage device, and a control method and a mounting method for the gas storage reservoir. An inner foundation structure (100) surrounds the outer side of a ground film (500); an outer foundation structure (200) surrounds the outer side of the inner foundation structure (100); the edge of an inner film (310) is fixed to the inner foundation structure (100), and the ground film (500) is connected to the inner film (310); an inner cable net (320) is arranged on the outer surface of the inner film (310), and the inner cable net (320) is fixedly connected to the inner foundation structure (100); an accommodating cavity (610) is defined between the inner film (310) and the ground film (500), and the inner film (310) comprises a metal layer; an outer film structure (400) covers the outside of the inner film structure (300); the outer film structure (400) comprises an outer film (410) and an outer cable net (420); the edge of the outer film (410) is fixed on the outer foundation structure (200); the outer cable net (420) is arranged on the outer surface of the outer film (410), and the outer cable net (420) is fixedly connected to the outer foundation structure (200); an interlayer cavity (620) is defined between the outer film (410) and the inner film (310); an air supply device (820) is configured to inflate the interlayer cavity (620); an air discharge device (810) is configured to discharge air in the interlayer cavity (620). The volume of the accommodating cavity (610) of the gas storage reservoir can be larger so as to store more gas, film materials are not susceptible to tearing, and gas is not prone to leakage.
22 gas-liquid phase change for supplementing external energy, comprising: a gas storage pool (100); a liquid storage tank (200); an energy storage assembly (300), the energy storage assembly (300) being provided between the gas storage pool (100) and the liquid storage tank (200); an energy release assembly (400), the energy release assembly (400) being provided between the gas storage pool (100) and the liquid storage tank (200), the energy release assembly (400) comprising at least one expansion and release portion, and the expansion and release portion comprising an energy release heat exchanger, a supplemental energy heat exchanger, and an expander; a heat exchange assembly (500), the energy storage assembly (300) and the energy release assembly (400) being both connected to the heat exchange assembly (500), and the heat exchange assembly (500) transferring part of energy generated in the energy storage assembly (300) into the energy release assembly (400); and an energy supplement assembly, comprising an external heat source (810), the supplemental energy heat exchanger being connected to the external heat source (810), and the external heat source (810) supplying energy to the expander by means of the supplemental energy heat exchanger.
An energy storage device and method based on carbon dioxide gas-liquid phase change. The energy storage device based on carbon dioxide gas-liquid phase change comprises: a gas storage (100); a liquid storage tank (200); an energy storage assembly (300), the energy storage assembly (300) being arranged between the gas storage (100) and the liquid storage tank (200), and carbon dioxide being changed from a gas state to a liquid state through the energy storage assembly (300); an energy release assembly (400), the energy release assembly (400) being arranged between the gas storage (100) and the liquid storage tank (200), and the carbon dioxide being changed from the liquid state to the gas state through the energy release assembly (400); a heat exchange assembly (500), the energy storage assembly (300) and the energy release assembly (400) being both connected to the heat exchange assembly (500), and the heat exchange assembly (500) being capable of transferring some of the energy generated in the energy storage assembly (300) to the energy release assembly (400); and a heat recovery assembly, at least one of energy released when the carbon dioxide is changed from the gas state to the liquid state, energy released when the carbon dioxide is cooled before entering the gas storage (100), and energy released when a heat exchange medium is cooled being recovered by the heat recovery assembly and used for evaporation of the carbon dioxide. The device can reduce energy waste in storage and release processes and improve the energy utilization rate.
F24S 20/40 - Solar heat collectors combined with other heat sources, e.g. using electrical heating or heat from ambient air
F01K 25/10 - Plants or engines characterised by use of special working fluids, not otherwise provided forPlants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
F24S 20/00 - Solar heat collectors specially adapted for particular uses or environments
F01K 25/00 - Plants or engines characterised by use of special working fluids, not otherwise provided forPlants operating in closed cycles and not otherwise provided for
10.
CARBON DIOXIDE GAS-LIQUID PHASE CHANGE-BASED ENERGY STORAGE APPARATUS CAPABLE OF CONVERTING HEAT ENERGY INTO MECHANICAL ENERGY
The present invention relates to a carbon dioxide gas-liquid phase change-based energy storage apparatus capable of converting heat energy into mechanical energy, comprising: a gas storage holder; a liquid storage tank; an energy storage assembly, the energy storage assembly being disposed between the gas storage holder and the liquid storage tank, carbon dioxide changing from gas to liquid by means of the energy storage assembly, and the energy storage assembly comprising a compressor; an energy release assembly, the energy release assembly being disposed between the gas storage holder and the liquid storage tank, and carbon dioxide changing from liquid to gas by means of the energy release assembly; a heat exchange assembly that can transfer part of energy generated in the energy storage assembly to the energy release assembly; and a driving assembly, the driving assembly being connected to the energy storage assembly, and the driving assembly comprising an energy input member and a first driving member. Part of carbon dioxide flowing out of the compressor can be diverted to the driving assembly, carbon dioxide diverted to the driving assembly can absorb external heat energy by means of the energy input member and drive the first driving member to work, and the first driving member can drive the compressor to work. The apparatus can utilize waste heat generated in industrial production, thereby reducing the waste of heat energy and saving energy.
22 gas-liquid phase transition-based multistage compression energy storage apparatus for converting thermal energy into mechanical energy, comprising: a gas storage (100); a liquid storage tank (200); an energy storage assembly (300), which comprises a condenser (350) and at least two compression energy storage parts, which comprise compressors (310 and 330) and energy storage heat exchangers (320 and 340); an energy release assembly (400), which comprises an evaporator (410) and at least one expansion energy release part, which comprises energy release heat exchangers (420 and 440) and expanders (430 and 450); a heat exchange assembly (500), the energy storage heat exchangers (320 and 340) and the energy release heat exchangers (420 and 440) being connected to the heat exchange assembly (500), the energy storage heat exchangers (320 and 340) temporarily storing in the heat exchange assembly (500) the energy generated by the energy storage assembly (300), and the energy release heat exchangers (420 and 440) being capable of receiving the energy temporarily stored by the heat exchange assembly (500); and a driving assembly (800), which comprises an energy input member (810) and a first driving member (820), the energy input member (810) absorbing external thermal energy to drive the first driving member (820) to work, and the first driving member (820) being used for driving the compressors (310 and 330) to work. By means of the apparatus, waste heat generated during a manufacturing process can be stored and reused, thus reducing the wastage of thermal energy, and saving energy.
F24S 20/40 - Solar heat collectors combined with other heat sources, e.g. using electrical heating or heat from ambient air
F01K 25/10 - Plants or engines characterised by use of special working fluids, not otherwise provided forPlants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
12.
MULTISTAGE-COMPRESSION ENERGY STORAGE APPARATUS AND METHOD BASED ON CARBON DIOXIDE GAS-LIQUID PHASE CHANGE
An energy storage apparatus and method based on carbon dioxide gas-liquid phase change. The energy storage apparatus based on carbon dioxide gas-liquid phase change comprises a gas storage bank (100); a liquid storage tank (200); an energy storage assembly (300), provided between the gas storage bank (100) and the liquid storage tank (200), wherein the energy storage assembly (300) comprises a condenser (350) and at least two compression energy storage portions, and the compression energy storage portions comprise compressors (310, 330) and energy storage heat exchangers (320, 340); an energy release assembly (400), provided between the gas storage bank (100) and the liquid storage tank (200), wherein the energy release assembly (400) comprises an evaporator (410), an energy release cooler (460), and at least one expansion energy release portion, and the expansion energy release portion comprises expanders (430, 450) and energy release heat exchangers (420, 440); and a heat exchange assembly (500), comprising a cool storage tank (510), a heat storage tank (520), and heat recovery heat exchangers (540, 550), wherein the cool storage tank (510) and the heat storage tank (520) form a heat exchange circuit between the energy storage heat exchangers (320, 340) and the energy release heat exchangers (420, 440), a heat exchange medium can flow in the heat exchange circuit, and at least one of the condenser (350), the energy release cooler (460), and the heat recovery heat exchangers (540, 550) is connected to the evaporator (410). When energy is stored and released by means of the apparatus, energy waste can be reduced, and the utilization rate of the energy is improved.
F24S 20/40 - Solar heat collectors combined with other heat sources, e.g. using electrical heating or heat from ambient air
F01K 25/10 - Plants or engines characterised by use of special working fluids, not otherwise provided forPlants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
13.
MULTISTAGE-COMPRESSION ENERGY STORAGE APPARATUS AND METHOD BASED ON CARBON DIOXIDE GAS-LIQUID PHASE CHANGE
An energy storage apparatus and method based on carbon dioxide gas-liquid phase change. The energy storage apparatus based on carbon dioxide gas-liquid phase change comprises a gas storage bank (100); a liquid storage tank (200); an energy storage assembly (300), provided between the gas storage bank (100) and the liquid storage tank (200), wherein the energy storage assembly (300) comprises a condenser (350) and at least two compression energy storage portions, and the compression energy storage portions comprise compressors (310, 330) and energy storage heat exchangers (320, 340); an energy release assembly (400), provided between the gas storage bank (100) and the liquid storage tank (200), wherein the energy release assembly (400) comprises an evaporator (410), an energy release cooler (460), and at least one expansion energy release portion, and the expansion energy release portion comprises expanders (430, 450) and energy release heat exchangers (420, 440); and a heat exchange assembly (500), comprising a cool storage tank (510), a heat storage tank (520), and heat recovery heat exchangers (540, 550), wherein the cool storage tank (510) and the heat storage tank (520) form a heat exchange circuit between the energy storage heat exchangers (320, 340) and the energy release heat exchangers (420, 440), a heat exchange medium can flow in the heat exchange circuit, and at least one of the condenser (350), the energy release cooler (460), and the heat recovery heat exchangers (540, 550) is connected to the evaporator (410). When energy is stored and released by means of the apparatus, energy waste can be reduced, and the utilization rate of the energy is improved.
F01K 25/10 - Plants or engines characterised by use of special working fluids, not otherwise provided forPlants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
F24S 20/40 - Solar heat collectors combined with other heat sources, e.g. using electrical heating or heat from ambient air
F25B 9/00 - Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
ACO2 gas-liquid phase transition-based multistage compression energy storage apparatus for converting thermal energy into mechanical energy, including: a gas storage ; a liquid storage tank; an energy storage assembly, which includes compressors and energy storage heat exchangers; an energy release assembly, which includes energy release heat exchangers and expanders; a heat exchange assembly, the energy storage heat exchangers temporarily storing in the heat exchange assembly the energy generated by the energy storage assembly, and the energy release heat exchangers being capable of receiving the energy temporarily stored by the heat exchange assembly; and a driving assembly, which includes an energy input member and a first driving member, the energy input member absorbing external thermal energy to drive the first driving member to work, and the first driving member being used for driving the compressors to work.
F01K 25/10 - Plants or engines characterised by use of special working fluids, not otherwise provided forPlants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
F24S 20/40 - Solar heat collectors combined with other heat sources, e.g. using electrical heating or heat from ambient air
F25B 9/00 - Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
A gas storage reservoir, an energy storage device, and a control method and a mounting method for the gas storage reservoir. An inner foundation structure (100) surrounds the outer side of a ground film (500); an outer foundation structure (200) surrounds the outer side of the inner foundation structure (100); the edge of an inner film (310) is fixed to the inner foundation structure (100), and the ground film (500) is connected to the inner film (310); an inner cable net (320) is arranged on the outer surface of the inner film (310), and the inner cable net (320) is fixedly connected to the inner foundation structure (100); an accommodating cavity (610) is defined between the inner film (310) and the ground film (500), and the inner film (310) comprises a metal layer; an outer film structure (400) covers the outside of the inner film structure (300); the outer film structure (400) comprises an outer film (410) and an outer cable net (420); the edge of the outer film (410) is fixed on the outer foundation structure (200); the outer cable net (420) is arranged on the outer surface of the outer film (410), and the outer cable net (420) is fixedly connected to the outer foundation structure (200); an interlayer cavity (620) is defined between the outer film (410) and the inner film (310); an air supply device (820) is configured to inflate the interlayer cavity (620); an air discharge device (810) is configured to discharge air in the interlayer cavity (620). The volume of the accommodating cavity (610) of the gas storage reservoir can be larger so as to store more gas, film materials are not susceptible to tearing, and gas is not prone to leakage.
An energy storage device and method based on carbon dioxide gas-liquid phase change. The energy storage device based on carbon dioxide gas-liquid phase change comprises: a gas storage (100); a liquid storage tank (200); an energy storage assembly (300), the energy storage assembly (300) being arranged between the gas storage (100) and the liquid storage tank (200), and carbon dioxide being changed from a gas state to a liquid state through the energy storage assembly (300); an energy release assembly (400), the energy release assembly (400) being arranged between the gas storage (100) and the liquid storage tank (200), and the carbon dioxide being changed from the liquid state to the gas state through the energy release assembly (400); a heat exchange assembly (500), the energy storage assembly (300) and the energy release assembly (400) being both connected to the heat exchange assembly (500), and the heat exchange assembly (500) being capable of transferring some of the energy generated in the energy storage assembly (300) to the energy release assembly (400); and a heat recovery assembly, at least one of energy released when the carbon dioxide is changed from the gas state to the liquid state, energy released when the carbon dioxide is cooled before entering the gas storage (100), and energy released when a heat exchange medium is cooled being recovered by the heat recovery assembly and used for evaporation of the carbon dioxide. The device can reduce energy waste in storage and release processes and improve the energy utilization rate.
F01K 25/00 - Plants or engines characterised by use of special working fluids, not otherwise provided forPlants operating in closed cycles and not otherwise provided for
F01K 25/10 - Plants or engines characterised by use of special working fluids, not otherwise provided forPlants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
F24S 20/00 - Solar heat collectors specially adapted for particular uses or environments
F24S 20/40 - Solar heat collectors combined with other heat sources, e.g. using electrical heating or heat from ambient air
F25B 9/00 - Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
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